cant figure out why i get the error. Have not change anything in the server.js file.

complete error code:
Error: Cannot find module ‘express’

at Function.Module._resolveFilename (module.js:547:15)
at Function.Module._load (module.js:474:25)
at Module.require (module.js:596:17)
at require (internal/module.js:11:18)

at Object. (/app/server.js:9:15)

at Module._compile (module.js:652:30)
at Object.Module._extensions..js (module.js:663:10)
at Module.load (module.js:565:32)
at tryModuleLoad (module.js:505:12)
at Function.Module._load (module.js:497:3)

I tried adding and deleting files, I ended up just forking the project again from the FCC intro link at the beginning of the section and copy pasted my own code back in again and it worked fine… I’d really like to deploy and complete these on github as well.

It works now no change in code just made new project and copy paste my old code:

Will try to set up a server myself, or I cannot continue to learn…
Update: I cloned the repo on my server and done what was asked on an exercise (again, I passed the exercise already when glitch was working so I know it’s not the code), I am able to launch the app with node start and see the page on my-server-ip:port but fcc can’t accept it apparently as a solution, does it require a glitch project?

Same mistake on the very first node challenge, glitch giver the error cannot find module /app/server.js
I tried everything, reforking the project, recreating the files, nothing helps. Are there any other platforms to recommend instead of Glitch? Thanks!

EDIT: Apparently recreating it again on glitch from the very same link for the third time gave me different package.json file and after I completed the challenge request, it worked.